a trip that has been organized for a particular purpose such as a scientific or military one or for exploration

探险, 远征

to go for a long walk or journey, particularly in the mountains, forests, etc. as an adventure

徒步旅行, 远足

a structure built over a river, road, etc. that enables people or vehicles to go from one side to the other

桥

a valley that is deep and has very steep sides, through which a river is flowing usually

峡谷, 幽谷

the scientific study of the physical features of the Earth and its atmosphere, divisions, products, population, etc.

地理

the main part of a continent or country that is connected to a larger landmass, excluding surrounding islands or territories

大陆, 本土

a passage dug through or under a mountain or a structure, typically for cars, trains, people, etc.

隧道

a state of being widely known or recognized, usually because of notable achievements, talents, or actions

名声, 声誉

an activity in which someone jumps from a very high place with a rubber cord tied around their ankles

蹦极跳, 蹦极

to invite someone to compete or strongly suggest they should do something, often to test their abilities or encourage action

挑战, 邀请

